gorillajs
Version:
A smart development environment designed to easily install and neatly manage web applications. Gorilla JS frees you from the repetitive daily tasks like apps installation, database management, creation of virtual environment, server configuration… And it
331 lines (292 loc) • 8.84 kB
JavaScript
var fs = require('./fs.js')
var constants = require('constants')
var origCwd = process.cwd
var cwd = null
var platform = process.env.GRACEFUL_FS_PLATFORM || process.platform
process.cwd = function() {
if (!cwd)
cwd = origCwd.call(process)
return cwd
}
try {
process.cwd()
} catch (er) {}
var chdir = process.chdir
process.chdir = function(d) {
cwd = null
chdir.call(process, d)
}
module.exports = patch
function patch (fs) {
// (re-)implement some things that are known busted or missing.
// lchmod, broken prior to 0.6.2
// back-port the fix here.
if (constants.hasOwnProperty('O_SYMLINK') &&
process.version.match(/^v0\.6\.[0-2]|^v0\.5\./)) {
patchLchmod(fs)
}
// lutimes implementation, or no-op
if (!fs.lutimes) {
patchLutimes(fs)
}
// https://github.com/isaacs/node-graceful-fs/issues/4
// Chown should not fail on einval or eperm if non-root.
// It should not fail on enosys ever, as this just indicates
// that a fs doesn't support the intended operation.
fs.chown = chownFix(fs.chown)
fs.fchown = chownFix(fs.fchown)
fs.lchown = chownFix(fs.lchown)
fs.chmod = chmodFix(fs.chmod)
fs.fchmod = chmodFix(fs.fchmod)
fs.lchmod = chmodFix(fs.lchmod)
fs.chownSync = chownFixSync(fs.chownSync)
fs.fchownSync = chownFixSync(fs.fchownSync)
fs.lchownSync = chownFixSync(fs.lchownSync)
fs.chmodSync = chmodFixSync(fs.chmodSync)
fs.fchmodSync = chmodFixSync(fs.fchmodSync)
fs.lchmodSync = chmodFixSync(fs.lchmodSync)
fs.stat = statFix(fs.stat)
fs.fstat = statFix(fs.fstat)
fs.lstat = statFix(fs.lstat)
fs.statSync = statFixSync(fs.statSync)
fs.fstatSync = statFixSync(fs.fstatSync)
fs.lstatSync = statFixSync(fs.lstatSync)
// if lchmod/lchown do not exist, then make them no-ops
if (!fs.lchmod) {
fs.lchmod = function (path, mode, cb) {
if (cb) process.nextTick(cb)
}
fs.lchmodSync = function () {}
}
if (!fs.lchown) {
fs.lchown = function (path, uid, gid, cb) {
if (cb) process.nextTick(cb)
}
fs.lchownSync = function () {}
}
// on Windows, A/V software can lock the directory, causing this
// to fail with an EACCES or EPERM if the directory contains newly
// created files. Try again on failure, for up to 60 seconds.
// Set the timeout this long because some Windows Anti-Virus, such as Parity
// bit9, may lock files for up to a minute, causing npm package install
// failures. Also, take care to yield the scheduler. Windows scheduling gives
// CPU to a busy looping process, which can cause the program causing the lock
// contention to be starved of CPU by node, so the contention doesn't resolve.
if (platform === "win32") {
fs.rename = (function (fs$rename) { return function (from, to, cb) {
var start = Date.now()
var backoff = 0;
fs$rename(from, to, function CB (er) {
if (er
&& (er.code === "EACCES" || er.code === "EPERM")
&& Date.now() - start < 60000) {
setTimeout(function() {
fs.stat(to, function (stater, st) {
if (stater && stater.code === "ENOENT")
fs$rename(from, to, CB);
else
cb(er)
})
}, backoff)
if (backoff < 100)
backoff += 10;
return;
}
if (cb) cb(er)
})
}})(fs.rename)
}
// if read() returns EAGAIN, then just try it again.
fs.read = (function (fs$read) { return function (fd, buffer, offset, length, position, callback_) {
var callback
if (callback_ && typeof callback_ === 'function') {
var eagCounter = 0
callback = function (er, _, __) {
if (er && er.code === 'EAGAIN' && eagCounter < 10) {
eagCounter ++
return fs$read.call(fs, fd, buffer, offset, length, position, callback)
}
callback_.apply(this, arguments)
}
}
return fs$read.call(fs, fd, buffer, offset, length, position, callback)
}})(fs.read)
fs.readSync = (function (fs$readSync) { return function (fd, buffer, offset, length, position) {
var eagCounter = 0
while (true) {
try {
return fs$readSync.call(fs, fd, buffer, offset, length, position)
} catch (er) {
if (er.code === 'EAGAIN' && eagCounter < 10) {
eagCounter ++
continue
}
throw er
}
}
}})(fs.readSync)
}
function patchLchmod (fs) {
fs.lchmod = function (path, mode, callback) {
fs.open( path
, constants.O_WRONLY | constants.O_SYMLINK
, mode
, function (err, fd) {
if (err) {
if (callback) callback(err)
return
}
// prefer to return the chmod error, if one occurs,
// but still try to close, and report closing errors if they occur.
fs.fchmod(fd, mode, function (err) {
fs.close(fd, function(err2) {
if (callback) callback(err || err2)
})
})
})
}
fs.lchmodSync = function (path, mode) {
var fd = fs.openSync(path, constants.O_WRONLY | constants.O_SYMLINK, mode)
// prefer to return the chmod error, if one occurs,
// but still try to close, and report closing errors if they occur.
var threw = true
var ret
try {
ret = fs.fchmodSync(fd, mode)
threw = false
} finally {
if (threw) {
try {
fs.closeSync(fd)
} catch (er) {}
} else {
fs.closeSync(fd)
}
}
return ret
}
}
function patchLutimes (fs) {
if (constants.hasOwnProperty("O_SYMLINK")) {
fs.lutimes = function (path, at, mt, cb) {
fs.open(path, constants.O_SYMLINK, function (er, fd) {
if (er) {
if (cb) cb(er)
return
}
fs.futimes(fd, at, mt, function (er) {
fs.close(fd, function (er2) {
if (cb) cb(er || er2)
})
})
})
}
fs.lutimesSync = function (path, at, mt) {
var fd = fs.openSync(path, constants.O_SYMLINK)
var ret
var threw = true
try {
ret = fs.futimesSync(fd, at, mt)
threw = false
} finally {
if (threw) {
try {
fs.closeSync(fd)
} catch (er) {}
} else {
fs.closeSync(fd)
}
}
return ret
}
} else {
fs.lutimes = function (_a, _b, _c, cb) { if (cb) process.nextTick(cb) }
fs.lutimesSync = function () {}
}
}
function chmodFix (orig) {
if (!orig) return orig
return function (target, mode, cb) {
return orig.call(fs, target, mode, function (er) {
if (chownErOk(er)) er = null
if (cb) cb.apply(this, arguments)
})
}
}
function chmodFixSync (orig) {
if (!orig) return orig
return function (target, mode) {
try {
return orig.call(fs, target, mode)
} catch (er) {
if (!chownErOk(er)) throw er
}
}
}
function chownFix (orig) {
if (!orig) return orig
return function (target, uid, gid, cb) {
return orig.call(fs, target, uid, gid, function (er) {
if (chownErOk(er)) er = null
if (cb) cb.apply(this, arguments)
})
}
}
function chownFixSync (orig) {
if (!orig) return orig
return function (target, uid, gid) {
try {
return orig.call(fs, target, uid, gid)
} catch (er) {
if (!chownErOk(er)) throw er
}
}
}
function statFix (orig) {
if (!orig) return orig
// Older versions of Node erroneously returned signed integers for
// uid + gid.
return function (target, cb) {
return orig.call(fs, target, function (er, stats) {
if (!stats) return cb.apply(this, arguments)
if (stats.uid < 0) stats.uid += 0x100000000
if (stats.gid < 0) stats.gid += 0x100000000
if (cb) cb.apply(this, arguments)
})
}
}
function statFixSync (orig) {
if (!orig) return orig
// Older versions of Node erroneously returned signed integers for
// uid + gid.
return function (target) {
var stats = orig.call(fs, target)
if (stats.uid < 0) stats.uid += 0x100000000
if (stats.gid < 0) stats.gid += 0x100000000
return stats;
}
}
// ENOSYS means that the fs doesn't support the op. Just ignore
// that, because it doesn't matter.
//
// if there's no getuid, or if getuid() is something other
// than 0, and the error is EINVAL or EPERM, then just ignore
// it.
//
// This specific case is a silent failure in cp, install, tar,
// and most other unix tools that manage permissions.
//
// When running as root, or if other types of errors are
// encountered, then it's strict.
function chownErOk (er) {
if (!er)
return true
if (er.code === "ENOSYS")
return true
var nonroot = !process.getuid || process.getuid() !== 0
if (nonroot) {
if (er.code === "EINVAL" || er.code === "EPERM")
return true
}
return false
}